1977 International Scout II Traveler

Hi there. My friend has a scout that has trouble cranking and when I do finally get it started it runs fine for about 5 minutes and will die in just a split second, like the ignition was turned off. No stumbling or anticipation of shutting down. It will then restart, run fine, and shut down again. He swears that a faulty starter will cause a vehicle to quit running, but I have never heard of this. I've dealt with a lot of bad starters before, and they would run fine, just wouldn't start well. Is this the case? I do think the starter is bad, but don't think it would cause it to quit. I already suspected and replaced the "Gold box" igntion module so I don't think that's the problem unless the new one is faulty. Fuel, plugs, wires, cap and rotor seem to be fine. Thanks, Hope you can help.

-Aaron Paia, HI